200R4 vs A518 vs Keisler A41 fitment

Professor Fate said

The SSA41 kit also makes no mention of a big block bellhousing being available. It also requires a computer and it's engine sensors (TPS, etc.) for shifting. They claim "no tunnel mods necessary", but don't mention crossmember mods. The trans is modified to accept a speedometer cable, which they supply.

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I had already reached out to SST on the A41, they can indeed supply the unit with a big block bell and the install kit comes complete with a lower crossmember, the electronics/controller package, Upper crossmember mods are claimed to be limited to cutting out a specific area of the top of the crossmember (they sent me a PDF of the cut template and instructions).

It sounds like a well planned package, but I'd be really interested to hear from anyone who has actually done/seen one